The primary responsibility of the cabin crew during an evacuation is to direct passengers to evacuate the aircraft using all of the usable exits. The aim of an evacuation is to ensure that passengers and crewmembers leave the aircraft as rapidly and as safely as possible. Many factors contribute to the successful evacuation of the aircraft: • The procedural knowledge of the cabin crew: This includes training, experience, and behaviour • The environment inside and outside of the aircraft (e.g., the presence of smoke, fire, the cabin lighting, and outside conditions) • The passengers’ behaviour, age, level of fitness, and motivation • The aircraft configuration, and the layout of the cabin.